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Temperature and Moisture Compensation on Three-Wire Capacitive Sensors for Air Bag Applications
Technical Paper
2004-01-0849
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Air bags have saved many lives. Nevertheless as they use pyrotechnic inflating devices, they can prove to be dangerous in some identified positional conditions. Furthermore, the strength used to inflate the bag must match the passenger morphology so as not to hurt him. Therefore morphological estimation and position monitoring is required for the Static or Dynamic Automatic Suppression of the new FMVSS208 regulation. The Faurecia BioVolume sensing system uses capacitive sensors to perform both monitoring and morphological estimation. This technology presents many advantages such as low cost and easiness of integration but presents some drawbacks amongst them is their sensibility to temperature and humidity[1]. In this paper the authors show that it is possible to get rid of the drifts induced by temperature and moisture with the three-wire probe technology[2] implemented in BioVolume.
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Authors
- Jérôme Lucas - Laboratoire d'Electricité Générale, Ecole Supérieure de Physique et de Chimie Industrielles, Paris, France
- Christophe Batis - Laboratoire d'Electricité Générale, Ecole Supérieure de Physique et de Chimie Industrielles, Paris, France
- Stéphane Holé - Laboratoire des Instruments et Systèmes d'île de France, Université Pierre et Marie Curie, Paris, France
- Thierry Ditchi - Laboratoire des Instruments et Systèmes d'île de France, Université Pierre et Marie Curie, Paris, France
- Claude Launay - Hitachi Computer Products, Olivet, France
- Joaquim Da Silva - Hitachi Computer Products, Olivet, France
- Bertrand Billon - Faurecia, France
- Hervé Dirand - Faurecia, France
- Marc Pajon - Faurecia, France
Citation
Lucas, J., Batis, C., Holé, S., Ditchi, T. et al., "Temperature and Moisture Compensation on Three-Wire Capacitive Sensors for Air Bag Applications," SAE Technical Paper 2004-01-0849, 2004, https://doi.org/10.4271/2004-01-0849.Also In
References
- Bevan M. “Introduction to occupant sensors.” Proceedings SAE Seminars N o 99008 Apr 19 2002 Troy, MI
- Lucas J. Batis C. Holé S. Ditchi T. Launay C. Da Silva J. “Distance corrected capacitive sensors for advanced air bag applications.” SAE Technical Paper Series 2003-01-0508
- Pajon M. Chabert L Dirand H. Jaillet L. Launay C. Da Silva J. Parbaud P. Voisin F. “BioVolume: The Seat Integrated Human Based System to Meet FMVSS208 Automatic Suppression Concerns” SAE Technical Paper Series 2003-01-0515
- DURANT “Electrostatique Problème généraux conducteurs” 152 156 1966 ie
- Baxter L. “Capacitive sensors design and applications” IEEE press 1997